Oracle刪除重複記錄只保留一條數據的幾種方法

一、查找表中多餘的重複記錄，重複記錄是根據單個字段（peopleId）來判斷sql SELECT * FROM people WHERE peopleid IN ( SELECT peopleid FROM people GROUP BY peopleid HAVING COUNT (peopleid) > 1 ) 二、刪除表中多餘的重複記錄，重複記

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